VCM Brochure

TRANSFORMER MONITORING – SECURE AND EXTEND TRANSFORMER LIFE

Comprehensive monitoring of transformers’ key operating parameters provides control outputs and diagnostics for long life of the transformer. With integrated intelligence, and analysis of the transformer’s condition from VT-GT, maintaining the transformer in prime operating condition is
made easier and the life of the transformer is extended. This value added protection of the asset serves as an intelligent transformer physician.

VCM KEY BENEFITS:

While the VCM2 monitors all the essential operating parameters of the transformer, VCM3 adds additional protection by enabling:

VCM Brochure

VCM2

A Second Generation, PLC based Transformer Monitoring and Diagnostic Module developed by Virginia Transformer Corp. This device monitors all essential transformer operating parameters, providing actual and on-line diagnostics with SCADA output.

VCM 2 provides transformer monitoring and protection

The VCM2 is an integrated module for all essential transformer parameters with accurate monitoring, control, and data collection.

Virginia Transformer Corp offers VCM2 state of the art technology to provide comprehensive monitoring and protection for Class I power transformers.

VCM 2 provides transformer monitoring and protection

FEATURES

Output Controls

Based on the measurements, the following set points are activated:

Winding Temperature

Outputs and Measruremets:

Oil level

Pressure

Other controls and outputs:

Display/Reporting:

All measurements and alarms are displayed locally on screen. Set points for fan operation and alarms can be changed locally for start up and testing. The measurements and historical data are available locally and through SCADA connection.

VCM2 Package Components:

Provides all the functions of VCM2 plus loss of life analysis, dissolved H2 gas analysis, moisture in the oil, moisture in paper insulation, LTC Tap Position, LTC differential temperature, LTC Off-Tap, and Low N2 Pressure Alarm.

VCM3 provides the ultimate in transformer monitoring and protection

For the first time in the industry all the values of measurements can be charted and analyzed for abnormal heating and gassing condition to schedule maintenance and achieve an extended life of the transformer, providing an early warning of impending failure. When integrated into the smart grid intelligence, this feature will protect the transmission system against a brown out or a black out.

Only VTC transformers offer VCM3 state of the art technology to provide comprehensive monitoring and protection of Class II power transformers with or without LTC, essentially making an Intelligent Transformer. Service interruptions are avoided with status reports of operating parameters. In the event of a potential condition, the VCM3 displays a warning locally on screen and sends an alarm to the user’s computer when connected.

transformer monitoring and protection

FEATURES

Solid-state Sensors and Set Points, 25 Point Annunciator

H2 Gas, Moisture, Loss of Life Monitoring

LTC Monitoring

Display/Reporting

VCM3 Package Components:

Comparison Table

The VCM is a proprietary PLC based monitoring and diagnostic module developed by Virginia Transformer Corporation, fitted exclusively on VTC Transformers and a single point service provided by VTC.

VCM FREQUENTLY ASKED QUESTIONS

1Q: How is the transformer protected in case the SRI function is not operating?

A: There are four levels of protection provided in VCM3:

  1. The Solid-State sensors used are of the finest quality. These sensors are made with a semiconductor quality control system similar to phones and TV’s.
  2. If the PLC is not receiving a signal from any sensor for any reason, the VCM3 displays an error message on the local screen and on the remote monitoring that the sensor is disconnected. An inactive sensor alarm is also activated. (All sensors can be changed without draining oil)
  3. In the event the VCM3 fails to show the Sensor Failed Alarm, the transformer is still protected by the mechanical Pressure Relief Device (PRD) set to open at 10 PSI.
  4. In the event of a sudden pressure build-up from gas generation, the sudden pressure relay will latch. This event will be registered by the Dissolved Gas Sensor and an alarm condition 1, 2, 3, 4 (depending on the amount of gasses) is displayed on the monitor via SCADA.
2Q: Can VCM3 be used when a UL rated transformer is requested?

A: Yes, All components in VCM3 are UL listed.